Share 'Bowel and bladder issues/ irritation'

HiI had been observing that since few weeks now ,my son uses restroom to move his bowel almost after he eats anything.I do not know what is the reason.his frequency in urination has also increased,If it is cold he will void almost every 30 min to 45 min.have any of you experienced this problem ,p
lease suggest me how to handle this situation,